How to use hitTestObject on many objects - actionscript-3

Question

I can check if one object is hiting another, but what if I have 10 MovieClip objects, and i want to check if any object is hiting ANY object:
package {
import flash.display.MovieClip;
import flashx.textLayout.events.DamageEvent;
import fl.motion.Animator;
import flash.geom.Point;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.events.Event;
import flash.geom.ColorTransform;
public class Test extends MovieClip {
private var arrows:Array;
private var timer:Timer;
public function Test() {
init();
}
private function init():void {
timer = new Timer(1000, 6);
timer.addEventListener(TimerEvent.TIMER, timerEvent);
arrows = new Array();
timer.start();
}
private function timerEvent(e:TimerEvent):void{
var arrow:Arrow = new Arrow();
arrow.x = 5;
arrow.y = Math.random() * 200 + 10;
addChild(arrow);
arrow.addEventListener(Event.ENTER_FRAME, onEnterFrame);
arrows.push(arrow);
//trace(555);
}
private function onEnterFrame(e:Event):void{
e.target.x += 4;
if(e.target.x > 400)
{
e.target.transform.colorTransform = new ColorTransform(0, 0, 1, 1, 0, 0, 1, 1);
e.target.removeEventListener(Event.ENTER_FRAME, onEnterFrame);
e.target.addEventListener(Event.ENTER_FRAME, goBack);
}
}
private function goBack(e:Event):void {
e.target.x -= 4;
if(e.target.x < 50)
{
e.target.transform.colorTransform = new ColorTransform(1, 1, 1, 1, 0, 0, 1, 1);
e.target.removeEventListener(Event.ENTER_FRAME, goBack);
e.target.addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
}
}
}
how can i check if any arrow is touching other arrow object?, doesn't matter what object,I need something like hitTestGlobal

Answer 1

At least you can all objects hitting one point by using method DisplayObjectContainer.getObjectsUnderPoint(point:Point). If boundaries of your main object is not changing you can predefine edge points that you will hit testing every EnterFrame event.

Answer 2

Yes. You will have to check hit test on every object you need. And yes, it's a costy operation, but when writing games there's no other workaround. Try using Vector instead of an Array for a little performance boost, as Vector is type dependant array and it uses less memory. You can check the syntax HERE.
You'd instantiate it like this:
private var arrows:Vector.<Arrow> = new Vector.<Arrow>();